add basic json export support for non-recurring events
switch from using Oj for JSON parsing to ‘json’,
add tests around json generation from calendar,
add tests around individual event recurrence
update README to remove Oj references
allow calendar to accept configuration directly
remove pry requirement in spec_helper
update configuration generation in application_helper
to avoid date conflicts in testing
Merge pull request #1 from robcole/json-output

Add Json output